Ask Nespresso for
recommendations about test equipment.
F U N C T I O N T E S T S
9.9Protective insulation test
9.9.1 What coffee machines have to be tested and when?
This test is necessary
for class 1 and 2 equipment (with/without protective earth)
after a repair whenever a general disassembly of the platform and/or core unit was performed.
9.9.2 General
Legal regulation
In case of a repair/modification of the coffee machine, the repair centre is bound by law to protect the user/consumer by
restoring the regular condition of the appliance and
performing the respective tests according to EN/IEC 603351 “Safety of household and similar electrical appliances” and national regulations (e.g. DIN VDE 0701).
Description
The insulation test
assures that wiring and insulation of the coffee machine fullfill the normative require ments after a repair,
rates the insulation capability of the coffee machine,
is a very dangerous test because of a high test voltage (500 V DC).
For the insulation test, phase and neutral wire are shunted at the power plug. Then a test voltage is applied between phase/neutral and selected parts of the coffee machine.
Test equipment
Special test equipment is needed that complies with the regulations to perform insula tion and withstanding voltage tests. Detailed requirements and tolerances must be veri fied with your local authorities or measurement supplier in any case.
Ideally the test equipment has a national power socket for testing, so that the coffee machine can plugged in directly. Otherwise a special shunt is necessary to connect the phase and neutral pin of the coffee machine’s power plug.
Test report
For legal reasons a repair or test report should be prepared and filed with following infor mation
customer (name, address)
type and serial number of coffee machine
date of repair/test(s)
performed test(s)/measuring value(s), test points
used test equipment
signature
144Citiz service manual
